I came across your instructions on Instructables and wanted to share the set my teen-age son and I designed. We hadn’t decided on a method for distinguishing on player’s pieces from another, but he definitely thinks your “fast-forward rusting” is cool!

Here’s the URL to my flickr set showing our set off on a board we already had:

There are no instructions for this one besides the video. It is very straight-forward and encourages people to use their creativity. However, the patina chemical comes from a craft store and has instructions with it.